Thanks for all the suggestions everyone. Dealer has raised a Puma case with BMW but said to me it was possible this was a characteristic. Judging by the replies on here and another forum I am hopeful that this is not the case. A tuning company i have used previously have also told me this is not normal. I love the car in every other respect so really want it fixed.
Appreciate all the suggestions. Any other thoughts, opinions or experiences of this problem gratefully received!
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